Functional genomics of Phytophthora infestans effectors and Solanum resistance genes

N. Champouret

Research output: Thesisinternal PhD, WU


Potato (Solanum tuberosum L.) is nowadays the most important non-cereal food crop in the world. It is prone to huge annual losses due to late blight, the disease caused by the oomycete pathogen Phytophthora infestans. Modern management of late blight necessitates the use of multiple resistance (R) genes, which requires efficient pipelines for identification, isolation and characterization of R genes. This thesis employs effectoromics, i.e. the use of effectors (pathogenic secreted protein) to probe corresponding R gene(s) in a host plant and sort out their functional redundancy and specificity. Using cytoplasmic RXLR effectors of P. infestans to probe resistant Solanum germplasm for late blight R genes, we were able to: (i) assess the biodiversity of Avr-blb1, characterize the genomic structure of virulent P. infestans isolates on Rpi-blb1 plants and thus provide a technical solution for long-term disease management; (ii) identify the centre of origin of R3a, characterize R3a gene homologues and a functional R gene (Rpi-sto2), and (iii) uncover the potential co-evolution at both R and Avr side for the R2/PiAvr2-PexRD11 interactions, providing more diversity and specificity of R2 homologues, which may be valuable for potato breeding
Original languageEnglish
QualificationDoctor of Philosophy
Awarding Institution
  • Wageningen University
  • Visser, Richard, Promotor
  • Jacobsen, Evert, Promotor
  • Vleeshouwers, Vivianne, Co-promotor
Award date9 Jun 2010
Place of Publication[S.l.
Print ISBNs9789085856580
Publication statusPublished - 2010


  • phytophthora infestans
  • solanum
  • wild relatives
  • disease resistance
  • genes
  • resistance breeding
  • genomics
  • plant-microbe interactions
  • host pathogen interactions

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